Lock-mortising machine.



I. H. BRADLEY.

LOOK MORTISING MACHINE.

APPLICATION FILED JULY24,1912.

Patented Oct. 7, 1913.

E O n- 924 5/556? 8 6 0 a 6 Am 6 X I ATT ORNEY COLUMBIA PLANOGRAPH co.,WASHINGTON. 04 c.

TED STATES PATENT orrion.

ivAN BRADLEY, or BRIDGEPORT, CONNECTICUT, AssIGNort TO THE BURNS ANDBAs'sIoK COMPANY, or BRIDGEPORT, CONNECTICUT, A coaronnrron or coN-NECTICUT.

7 Specification of Letters Patent.

Patented Oct. Z1913.

Application filed July 2 1912. Serial No. 711,310.

To all whom it may concern:

Be it known that I, IVAN H. BRADLEY, a citizen of the United States,residing at Bridgeport, county of Fairfield, State of Connecticut, haveinvented an Improvement in Lock-Mortising Machines, of which thefollowing is a specification.

This invention has for its general object to produce a strong anddurable machine of light Weight and having a minimum number of parts forcutting a recess in a piece of wood and a hole intersecting the recessat a right angle, an especial object being to produce a simple andefficient machine for cutting lock mortises and key holes 1n drawerfronts, cabinet doors, etc.

With these and other objects in view the invention consists in certainconstructions and in certain parts, improvements and combinations whichwill be hereinafter described and then specifically pointed out in theclaims hereunto appended.

In the accompanying drawing forming a part of this specification, Figure1 is a perspective view of the rear of the machine, the left end as seenfrom the front appearing in the drawing; Fig. 2 an elevation of thefront of the machine, showing in dotted lines the position of the workunder ordinary conditions and also the position of a curved piece ofwork, as,- a curved drawer front; Fig. 3 a detail'view partly insection, illustrating means for clamping the part being operated upon;Fig. 4 a detail view of one of the stops detached; Fig. 5 a detail viewof the driving disk and link, and Fig. 6 is a perspective view of a partoperated upon showing a mortise and key hole therein as cut by my novelmachine.

10 denotes the bed, 11 a wall extending vertically therefrom and havinga central opening 12, 13 a table at the top of the vertical wall, 14: abracket extending from the front of the bed and provided with a boss 15having a hole through it, 16 a stud. passing through the hole and lockedin position by set screw 17, 18 a pin projecting through the stud nearits upper end, and 19 angle brackets shown as adjustably secured to therear of the vertical wall by screws 20 passing through slots 21, thehorizontal arms of the brackets extending forward over the top of thewall. The work or part to be operated upon is indicated by 22, a mortiseby 23 and a key hole by 24-. The work is retained in position by beingclamped between angle brackets 19 and a plate 25 having a socket 26 toreceive the upper end of the stud. This clamping plate rests upon a facecam 27 rotatably mounted upon the stud and engaging pin 18 and providedwit-h a handle 28 for convenience in operation. The rear edge of theclamping plate sets away from the vertical wall, leaving a space betweenthem, but is provided with projections 29 which engage the vertical walland prevent the plate from turning.

Rotation of the cam in one direction through engagement with the pinraises the plate to clamp the work and retain it in place, reversemovement releasing the work, as will be clearly understood from Figs. 2and 3.

The mechanism for making mortises is carried by the bed and comprises aslide 30 which reciprocates longitudinally of the bed in ways 31 and aslide 32 which rcciprocates transversely to slide 30 in ways 83 uponslide 30. A spindle 34 journaled in bear ings 35 upon slide 32 carries achuck 36 which is adapted to receive an end and side cutting tool 37 bywhich the mortise is formed. The spindle is driven by means of a belt 38passing over a pulley 39 on the spindle. Slide 32 carrying the spindleis manipulated by means of a lever 40 pivoted as at 4:1 to a bracketsecured. to the vertical wall and connected to the slide by means of alink 42. A pull upon the lever acts to move slide 32 and the tool intooperative po' sition, from which position they are returned by a spring43, one end of which is connected to the slide and the otherto one ofthe ways 33', the return movement being stopped by engagement of thelever with the front of the vertical wall. The forward movement of theslide is limitedby the engagement of an adjustable plate 44 on theslidewith a stop pin a5 projecting from one of the ways. The plate isshown as locked in place after adjustment by means of a screw passingthrough a slot and engaging the slide. lteciprocatory movement isimparted to slide 30 by means ofa link 16, one end of which is pivotedto the'slide and the other to a stud 47 which is adjustably secured in aT-slrape'd slot in the face of a driving disk 48 carried by a shaft 49 journaled in a bear 50 upon the bed; The shaft and disk are 1 driven bymeans of ahelt 51 passing over a pulley 52 upon the shaft, rotation ofthe disk causing the link to reciprocate slide-3O and the parts carriedthereby.

The mechanism for making key holes is carried by table 13 and comprisesa slide 53 mounted longitudinally of the bed in ways 54, a slide 55which reciprocates transversely to slide 53 in ways 56 upon slide 53 anda slide 57 which reciprocates vertically in ways 58 upon an upright 59forming part of slide 55. A spindle 6O journaled in bear ings 61 uponslide 57 carries a chuck 62 which is adapted to receive an end and sidecutting tool 63 by which the key hole is cut.

The spindle is driven by means of a belt 64 passing over a belt pulley65 on the spindle and partly about idler pulleys 66 journaled upon abracket 67 secured to the vertical wall. Spindle 60 is placed in correctaline-' ment with mortising tool spindle 34 by adjusting slide 53 inways 54 and locking by means of set screws 68 carried by brackets 69 andengaging the ends of the slide. Slide 57 carrying the key hole cuttingspindle is manipulated by means of a handle 70 secured to the top of theslide. A downward push upon the handle acts to move the slide and'toolint-o operative position, in which position they are reciprocatedtransversely of the bed by pulling and pushing slide 55 in ways 56. Thereciprocatory movement of slide 55 is limited by the engagement of aplate 71 carried by the slide, with stop screws 72 carried by the armsof a bracket 73 secured to ways 56 (see Fig. 4 in connection with Fig.2).

When the handle 70 is released from the downward pressure, slide 57 andthe tool are returned to its normal position by a.

spring 74 (see Fig. 2) one end of which is connected to a pin 75 in theslide which projects through a slot in upright 59, and the other end toa pin near the top of the upright, movement in either direction beinglimited by engagement of pin 75 with the ends of the slot.

To counteract the horizontal pull of belt 64, on spindle 60, and preventslide 57 from binding in the ways, I provide a relatively stifi' spring76, one end of which is connected to the slide and the other to a hook77 located in the side of the upright.

The part to be operated upon is positioned with relation to the cuttingtools by means of a gage consisting of a rod 78 extending from verticalwall 11 and a stop 79 adjustably secured thereon by a set screw 80.

The operation is as follows: The part to be operated upon which forconvenience I will term the work, is placed over clamping plate 25 andunder the horizontal arms of brackets 19, the cam being of course turnedbackward to permit the clamping plate to drop down. The stop is then soadjusted upon the rod that when the end of the work is placed against itand the inner edge against the vertical wall, the predeterminedpositions for the mortise and key hole will be in alinementwith thecutting tools. The i cam is then turned forward, which raises theclamping plate and grips the work between said plate and the arms ofthebrackets, as will be clearly understood from the drawing. Should itbe required to operate upon so-called swell fronts for drawers, thebrackets are raised, as indicated by dotted lines in Fig. 2. It isimmaterial whether the mortise or key holeis cut first. If the key holeis cut first, it provides a certain amount of clearance for chips incutting the pressure upon the handle, spring 74 will re turn verticalslide 57 to it normal position. Should it be required to cut a key holeof unusual width, or longitudinal to the mortise, set screws 68 areloosened more or less to permit reciprocation of slide 53 in a direction longitudinalto the clamping plate and transverse to the key holeas shown in Fig. 6. The cutting of a wider key hole would simply requirea second reciprocation of slide 55. The operator would move slide 53 toone extreme of its movement as determined by set screws '68, reciprocateslide 55 and the cutting tool, then move slide 53 to the other extremeof its movement and then reciprocate slide 55 again.

The cutting of the mortise is caused by movement of lever 40. When thislever is pulled forward the mortising tool will pass through opening 12inthe vertical walland into the work until stopped by engagement ofplate 44 on slide 32 with stop pin 45. When the lever is released spring43 will withdraw the cutter from the work. It will be noted thatsimultaneously with'the forward movement of slide 32 and the mortisecutting tool just described, slide 32 and its ways will have atransverse reciprocatory movement through the reciprocation of slide 30in ways 31 longitudinally of the bed. This movement is produced by meansof link 46 and driving disk48, and deter mines the length of themortise. To make the mortise longer or shorter, stud 47 is adjustedoutward or inward in the groove in the face of the driving disk. It willthus be seen that the cutting of a mortise-and key hole, the work havingbeen adjusted in place,

requires only the manipulation of handle 7 O and lever 40 by theoperator, the boring and side cutting being performed simultaneously.

Having thus described my invention I claim: 7

1. An improvement in lock mortising machines comprising abed providedwith a vertical wall having an opening therein, a table extendingforwardly from the upper edge of said wall and provided with an opening,cutting mechanisms supported by saidbed and said table respectively andprojecting through the openings therein, and means for supporting thework in front of said opening in the wall and beneath said table.

2. An improvement in lock mortising machines comprising a bed providedwith a vertical wall having an opening therein, a table extendingforwardly from the upper edge of said wall and provided with an opening,cutting mechanisms supported by said bed and said table respectively andproj ecting through the openings therein, a supporting plate adjust-ablysupported beneath said1 table and in front of the opening in the wal 3.An improvement in look mortising machines comprising a bed having avertical wall provided with an opening therein, a table extendingforwardly from the upper edge of said wall and provided with an opening,a bracket extending forwardly from said bed beneath said table, a worksupporting plate carried by said bracket, and cutting mechanismssupported by said bed and said table respectively, and projectingthrough the openings therein.

4. 'An improvement in lock mortising machines comprising a bed having avertical wall provided with an opening therein, a tableextendingforwardly from the upper edge of said wall and provided with anopening, a bracket extending forwardly from said bed beneath said table,a work supporting plate carried by said bracket, a cam plate for raisingand lowering said supporting plate, and cutting mechanisms supported bysaid bed and said table respectively, and projecting through theopenings therein.

.5. An improvement in look mortising machines comprising a bed providedwith a vertical wall having an opening therein, a table extendingforwardly from the upper edge of said wall and provided with an opening,cutting mechanisms supported by.

said bed and said table respectively, and projecting through theopenings therein, a

supporting plate mounted beneath said table, and a cam plate for raisingand lowering said supporting plate. 7

6. An improvement in lock mortising machines comprising a bed providedwith a vertical wall having an opening therein, a table extendingforwardly from the upper edge of said wall and provided with an opening,cutting mechanisms supported by said bed and said table respectively,and projecting through the openings therein, a supporting plate mountedbeneath said table, and brackets secured to said vertical wall andcooperating with said supporting plate to clamp the work in place.

7 An improvement in look mortising machines comprising a bed providedwith a vertical wall having an opening therein, a table extendingforwardly from the upper edge of said wall and provided with an opening,cutting mechanisms supported by said bed and said table respectively andprojecting through the openings therein, a supporting plate mountedbeneath said table, brackets cooperating with said supporting plate toclamp the work, and means whereby said brackets may be adjusted withrelation to said supporting plate.

8. An improvement in lock mortising machines comprising a bed providedwith a vertical wall having an opening therein, a table extendingforwardly from the upper edge of said wall and provided with an opening,cutting mechanisms supported by said bed and said table respectively,and projecting through the openings therein, a supporting plateadjustably mounted beneath said table, and brackets adjustably securedto said vertical wall and cooperating with said table to clamp the work.

9. An improvement in lock mortising machines comprising a bed providedwith a vertical wall having an opening therein, a table extendingforwardly from the upper edge of said wall and provided with an opening,cutting mechanisms supported by said bed and said table respectively andprojecting through the openings therein, a

supporting plate mounted beneath said table, and brackets secured tosaid vertical wall and having overhanging arms cooperating with saidtable to clamp the work.

In testimony whereof I aflix my signature in presence of two witnesses.

' IVAN H. BRADLEY.

Witnesses:

S. W. ATHnRToN, E. M. GULVER.

Copies of this patentmay be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. G.

